电子元器件符号大全

http://www.360doc.com/content/12/0419/20/2006953_204998710.shtml

https://wenku.baidu.com/view/3965e473b90d6c85ec3ac6b2.html

https://wenku.baidu.com/view/4fe6943b0912a2161479298d.html

http://www.eepw.com.cn/article/267888.htm

集成运放：

https://wenku.baidu.com/view/5d60e1144431b90d6c85c785.html

延时触发器

https://zhidao.baidu.com/question/473517838.html

施密特触发器：